Theres no doubt that plants improve the wellbeing of all who care to interact with them. Just half an hour spent in the garden or park has a positive effect. A lunch-break wandering through the local park or countryside can restore nerves and sooth the soul. Even house plants at home and in the office have a healing and beneficial effect. They increase humidity and absorb certain polluting gases including formaldehyde in addition to mopping up airborne dust particles.